Pressure-roll for planers.



A. L. BYTHER.

PRESSURE ROLL FOR PLANERS.

APPLICATION FILED JULY 27, 1911.

Patented Oct. 7, 1913.

2 SHEETS-SHEET 1.

\\ u. .11 PLANOGRAIH C0,, WASHINGTON. n, c.

Patentd Oct. 7, 1913.

2 SHEETSPSHBET 2.

A. L. BYTHER. PRESSURE ROLL FOR PLANERS.

APPLICATION FILED JULY 27,1911. 1,075; 9 1.

'iiill ALFRED I. BYTHER, OF BANGOR, MAINE.

PRESSURE-ROLL FOR PLANERS.

Specification of Letters Patent.

Patented Get. '7, 1913.

Application filed July 27, 1911. Serial No. 640,887.

To all whom it may concern Be it known that I, ALFRED L. BYTHER, ofBangor, in the county of Penobscot and State of Maine, a citizen of theUnited States, have invented a new and useful Improvement inPressure-Rolls for Planers, of which the following is a full, clear, andexact description, reference being had to the accompanying drawings,forming a part of this specification, in explaining its nature.

My invention relates to an improvement in pressure rolls for planers.

Among the objects of my invention is to provide a roll in which thefriction induced by the thrust of the roll against the interior bearingparts subjected to wear will be distributed over a large bearing surfaceor area and reduced to a minimum, for in the operation of these rollsthe pressure against the friction-bearing parts is very great and causesrapid wear which it is one object of my invention to overcome as much aspos sible.

It is a further object of my invention to employ that type of pressureroll in which the roll consists of a series of sectional parts or unitseach having an individual bearing against the work by which the planerin which the rolls are employed is adapted for planing boards ofdifferent thicknesses at the same time, it being my essential object inemploying a roll of this kind to provide one in which the individualsections are as frictionless as possible in accordance with the primeobject of my invention and in which, also, each section or part is soarranged that its pressure adjustment can be easily changed.

My invention accordingly consists in providing a roll constructed inaccordance with the objects of my invention above described andpossessing other advantages of structural detail as may best be seen andunderstood by reference to the drawings, in which- Figure 1 shows infront elevation a portion of a roll constructed in accordance with myinvention and consisting of a plurality of sectional units or parts.Fig. 2 is a vertical cross section of one of the units or parts of theroll. Fig. 3 shows one of the units or parts in side elevation togetherwith those parts of the machine to which the unit is secured, theseparts being shown in cross section, and Fig. 4 is a longitudinalvertical section of one of the units or parts constituting the sectionalroll.

Referring to the drawings: 1 represents the sides and 2 the bed of aplaning machine, these parts being shown diagrammatically forillustrating the disposition and arrangement of the parts afterward tobe described.

3 indicates the sectional pressure roll or series of collective rolls orunits embodying my invention and which are parallelly arranged inalinement with one another justabove the bed 2 of the machine.

4 is a rod to which the individual sections or units are pivotallysecured. This rod extends between and is pivotally secured to the sides1 of the machine above the bed 2. Extending also between the two sidesof the machine and affixed thereto is a cross-bar or head 5. This bar isarranged back of the rod 4 and above the same, that is relatively to thebed 2 of the planer.

Each of the roller sections or units is provided with a roll carrierwhich in the construction shown comprises a bonnet or part pivotallysecured to the rod at. The several bonnets for the several units orsections each consists of spaced sides 6 and 7, respectively, and theconnecting part 8 interposed between the two sides. In the constructionshown (which of course may be varied) the bonnet is made of threeseparate parts consisting of the two side plates 6 and 7, respectively,and the interposed'part 8 of some considerable body of metal to whichthe sides are joined by cross-pins 9. Each of the bonnets is pivotallyarranged upon the rod or shaft 4L by said shaft extending through therespective bonnets at points off the center thereof or at one end of theseveral bonnets, each bonnet thence extending to lie in part beneath thecross-head 5 and even project slightly beyond the vertical plane of thecross-head.

Each of the carriers or bonnets of the respective roller sections orunits bears a roll. Each of these rolls consists of a fixed cylindricalbearing 10, which will hereinafter be termed the cylinder, inclosedpartly within and interposed between the two sides 6 and 7 of thecarrier or bonnet below the part 8 thereof and to which sides thecylinder is fixedly secured at a point preferably beneath the cross-head5 in the same vertical plane therewith. The cylinder 10 is preferably asolid body and is secured to the sides of the bonnet by a squared pin1.1 preventing its turning.

Fitting loosely around the cylinder 10 is a press-wheel 12 which is thepart that bears against the work. This wheel is capable of rotation asit bears against the work. ()n the inside the wheel is provided with anannular groove forming a box or chamber 18 in which are contained aseries of cylindrical roller bearings 1a which bear against the interiorsurface of the wheel and also against the outer or peripheral surface ofthe cylinder 10, running upon its surface as the wheel is turned andproviding an anti-friction bearing between the parts. Any lateraldisplacement of the rotary wheels is of course prevented by the sides ofthe respective bonnets which act as guides for the wheels as they turnon the roller bearings around the cylinders.

Each of the roller sections or units is yieldingly maintained in anoperative and adjusted position so that its roll or that portion thereofcomprising its rotary wheel 12 will have proper bearing against thework. This is accomplished in the followlng manner: Connecting with eachof the bonnets, preferably at a point over the roll carried by it and inthe same vertical plane as the cross-head 5 is a pressure bar consistingof an eye-bolt 15. This bolt is pivotally secured to the bonnet by meansof a cross-pin 16 extending between and affixed to the sides of thebonnet and lying parallel to the shaft t so that as the bonnet turns onsaid shaft it may turn also relatively to said bolt. Each of theeye-bolts 15 extends vertically upward throu h openings formed in thecrosshead 5 and projects beyond the same. Afiixed to each eye-bolt at apoint preferably just adjacent the upper portion of the bonnet to whichitconnects is a collar 17. Arranged upon the bolt and interposed betweenthis collar and the under side of the cross-head is a coiled compressionspring 18. The upper ends of the several eye-bolts projecting throughthe cross-head 5 are threaded and each has arranged thereon an adjustingnut 19 which bears against the top surface of the cross-head above theopening therein a washer 20 being preferably interposed between it andthe head) and above the nut 19 is a locking nut 21.

The arrangement and disposition of the parts just above described issuch that each roller section or unit and the roll carried by it will beindependently, and both yieldingly and adjustably maintained in anoperative and graduated position.

Each roller section is free to turn on the rod 4 and consequently unlessheld would maintain a gravitated position in contact with the bed of themachine. Each section is held, however, so that its roll will maintain aposition adjacent to but removed from the bed by means of the eye-boltwhich connects therewith and extends upwardly through the cross-head asabove described, the nuts on the end of the bolt which bear against theupper surface of the cross-head, acting to hold the roller section awayfrom the bed of the machine. In this connection it will be observed thatthe precise adjusted position of the roller section and roll carried byit with relation to the bed of the machine will depend upon the adjustedposition of the nuts on the end of the eye-bolt. While the section isthus held against movement in a downward direction toward the bed of themachine, it is still capable of movement or turning in an upwarddirection, the shank of the eye-bolt simply extending through theopening in the cross head and the bolts being lifted above the topsurface thereof. This is prevented and the roller section and the rollcarried by it is yieldingly maintained as against turning or movement inan upward direction by means of the compression spring 18 interposedbetween the collar on the eye-bolt and the under side of the crosshead.In the normal arrangement of the parts this spring is maintained in thedescribed position under some degree of compression so that the springwill act to hold the roller section and roll carried by it as againstmovement in an upward direction yet will act only to yieldingly maintainthe same as against such movement, the eye-bolt being still capable ofrendering through the opening in the cross-head if sufficient force beexerted upon the roller section or roll carried by it as to effect afurther compression of the spring, the eye-bolt then rendering throughthe opening in the cross-head and the nuts arranged thereon being liftedabove the same.

It is obvious that the parts admit of considerable variance in theadjusted position of each roller section and roll with respect to thebed of the machine other than the adjustment of the nuts on the end ofthe eye-bolt. The construction is also such that springs of differentlengths or tensions can be easily inserted as occasion may require.

For the purpose-of keeping the surface of the wheels that engage thework clean there may be applied to the end of each bonnet a scraper 22held in place by a screw 24 and arranged so that the edge of the scrapermay just coincide with the peripheral surface of the bearing wheel,thereby acting to remove any matter that may accumulate upon it andprevent proper bearing of the V roll carrier and a roll borne by saidcarrier, each of said rolls borne by the carrier comprising a cylinderfixed to the carrier, an annular bearing wheel loosely arranged upon thecylinder, a series of roller hearings interposed between said wheel andsaid cylinder on which said wheel may turn around the cylinder, a rod towhich said carriers are pivotally secured whereby they may turn thereon,a fixture located above said carriers and a bar pivotally secured toeach one of said carriers and extending upwardly to pass loosely throughsaid fixture and project beyond the same, each of said bars havmg acollar thereon, compression springs arranged upon said bars betweentheir 001- lars and said fixture, and retaining and adjusting meansarranged upon the projectin ends of said bars above said fixture anbearing against the same.

ALFRED L. BYTHER. Witnesses:

HAROLD HINGKLEY, F. V. STRIOKLAND.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

